Subdividing detached duplex, zoned multi-family

I'm looking at a property that has two 2/1 detached units. The property is zoned multi-family. I believe the value of the property would increase immediately if these two units were divided into separate single families. Does anyone have any experience with this? I'm wondering what I am missing that could potentially make this a bad idea. My plan would be to purchase, renovate, and rent both units. However, prior to selling in the future if the property could be subdivided, I believe that would increase the value. Thanks for any input!